content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import java.util.Iterator;
  
  import io.reactivex.common.*;
  import io.reactivex.common.exceptions.Exceptions;
  import io.reactivex.common.functions.BiFunction;
  import io.reactivex.common.internal.disposables.DisposableHelper;
  import io.reactivex.common.internal.functions.ObjectHelper;
  import io.reactivex.observable.*;
  import io.reactivex.observable.internal.disposables.EmptyDisposable;
  
  public final class ObservableZipIterable<T, U, V> extends Observable<V> {
      final Observable<? extends T> source;
      final Iterable<U> other;
      final BiFunction<? super T, ? super U, ? extends V> zipper;
  
      public ObservableZipIterable(
              Observable<? extends T> source,
              Iterable<U> other, BiFunction<? super T, ? super U, ? extends V> zipper) {
          this.source = source;
          this.other = other;
          this.zipper = zipper;
      }
  
      @Override
      public void subscribeActual(Observer<? super V> t) {
          Iterator<U> it;
  
          try {
              it = ObjectHelper.requireNonNull(other.iterator(), "The iterator returned by other is null");
          } catch (Throwable e) {
              Exceptions.throwIfFatal(e);
              EmptyDisposable.error(e, t);
              return;
          }
  
          boolean b;
  
          try {
              b = it.hasNext();
          } catch (Throwable e) {
              Exceptions.throwIfFatal(e);
              EmptyDisposable.error(e, t);
              return;
          }
  
          if (!b) {
              EmptyDisposable.complete(t);
              return;
          }
  
          source.subscribe(new ZipIterableObserver<T, U, V>(t, it, zipper));
      }
  
      static final class ZipIterableObserver<T, U, V> implements Observer<T>, Disposable {
          final Observer<? super V> actual;
          final Iterator<U> iterator;
          final BiFunction<? super T, ? super U, ? extends V> zipper;
  
          Disposable s;
  
          boolean done;
  
          ZipIterableObserver(Observer<? super V> actual, Iterator<U> iterator,
                  BiFunction<? super T, ? super U, ? extends V> zipper) {
              this.actual = actual;
              this.iterator = iterator;
              this.zipper = zipper;
          }
  
          @Override
          public void onSubscribe(Disposable s) {
              if (DisposableHelper.validate(this.s, s)) {
                  this.s = s;
                  actual.onSubscribe(this);
              }
          }
  
  
          @Override
          public void dispose() {
              s.dispose();
          }
  
          @Override
          public boolean isDisposed() {
              return s.isDisposed();
          }
  
  
          @Override
          public void onNext(T t) {
              if (done) {
                  return;
              }
  
              U u;
  
              try {
                  u = ObjectHelper.requireNonNull(iterator.next(), "The iterator returned a null value");
              } catch (Throwable e) {
                  Exceptions.throwIfFatal(e);
                  error(e);
                  return;
              }
  
              V v;
              try {
                  v = ObjectHelper.requireNonNull(zipper.apply(t, u), "The zipper function returned a null value");
              } catch (Throwable e) {
                  Exceptions.throwIfFatal(e);
                  error(e);
                  return;
              }
  
              actual.onNext(v);
  
              boolean b;
  
              try {
                  b = iterator.hasNext();
              } catch (Throwable e) {
                  Exceptions.throwIfFatal(e);
                  error(e);
                  return;
              }
  
              if (!b) {
                  done = true;
                  s.dispose();
                  actual.onComplete();
              }
          }
  
          void error(Throwable e) {
              done = true;
              s.dispose();
              actual.onError(e);
          }
  
          @Override
          public void onError(Throwable t) {
              if (done) {
                  RxJavaCommonPlugins.onError(t);
                  return;
              }
              done = true;
              actual.onError(t);
          }
  
          @Override
          public void onComplete() {
              if (done) {
                  return;
              }
              done = true;
              actual.onComplete();
          }
  
      }
  }
  